Longan aroma compound and preparation method thereof
A compound and aroma technology, applied in the directions of essential oils/fragrance, fat generation, etc., can solve the problem of long fragrance retention time, achieve the effects of long fragrance retention time, high product quality, and meet the needs of the field of fragrance
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[0024] Example 1
[0025] A longan aroma compound has the following structural formula:
[0026]
[0027] A preparation method of longan aroma compound, comprising the steps:
[0028] S1, adding the berry acid to the first absolute anhydrous ether and fully stirring to obtain the absolute anhydrous ether solution of the berry acid, for subsequent use;
[0029] S2, continuously feed nitrogen into the reactor placed in the ice-water bath, add lithium aluminum hydride into the reactor, then dropwise add the second absolute anhydrous ether into the reactor at 0.8h, continue to stir for 25min after the dropwise addition, and then The absolute anhydrous ether solution of berry acid obtained in step S1 was added dropwise to the reactor within 0.8h and reacted at room temperature for 2.5h, and the reaction solution was obtained after the reaction was completed, which was used for later use; the temperature during the entire reaction process should not exceed 30 ° C;
[0030] S3, ...
Example Embodiment
[0037] Example 2
[0038] A longan aroma compound has the following structural formula:
[0039]
[0040] A preparation method of longan aroma compound, comprising the steps:
[0041] S1, adding the berry acid to the first absolute anhydrous ether and fully stirring to obtain the absolute anhydrous ether solution of the berry acid, for subsequent use;
[0042] S2, continue to feed nitrogen into the reactor placed in the ice-water bath, add lithium aluminum hydride into the reactor, then dropwise the second absolute anhydrous ether into the reactor at 0.9h, continue stirring for 28min after the dropwise addition, and then The absolute anhydrous ether solution of berry acid obtained in step S1 was added dropwise to the reactor within 0.9h and reacted at room temperature for 2.8h, and the reaction solution was obtained after the reaction was completed, which was used for later use; the temperature during the entire reaction process should not exceed 30 ° C;
[0043] S3, unde...
Example Embodiment
[0050] Example 3
[0051] A longan aroma compound has the following structural formula:
[0052]
[0053] A preparation method of longan aroma compound, comprising the steps:
[0054] S1, adding the berry acid to the first absolute anhydrous ether and fully stirring to obtain the absolute anhydrous ether solution of the berry acid, for subsequent use;
[0055] S2, continuously feed nitrogen into the reactor placed in the ice-water bath, add lithium aluminum hydride into the reactor, then drop the second absolute anhydrous ether into the reactor at 1.0 h, continue stirring for 30 min after the dropwise addition is complete, and then The absolute anhydrous ether solution of berry acid obtained in step S1 was added dropwise to the reactor within 1.0h and reacted at room temperature for 3.0h, and the reaction solution was obtained after the reaction was completed, which was used for later use; the temperature during the entire reaction process should not exceed 30 ° C;
[005...
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